reset
(PHP 4, PHP 5, PHP 7, PHP 8)
reset — Set the internal pointer of an array to its first element
Description
reset() rewinds array's internal
pointer to the first element and returns the value of the first array
element.
Parameters
-
array -
The input array.
Return Values
Returns the value of the first array element, or false if the array is
empty.
This function may
return Boolean false, but may also return a non-Boolean value which
evaluates to false. Please read the section on Booleans for more
information. Use the ===
operator for testing the return value of this
function.
Changelog
| Version | Description |
|---|---|
| 8.1.0 | Calling this function on objects is deprecated. Either use get_mangled_object_vars() on the object first, or use ArrayIterator. |
Examples
Example #1 reset() example
<?php
$array = array('step one', 'step two', 'step three', 'step four');
// by default, the pointer is on the first element
echo current($array) . "<br />\n"; // "step one"
// skip two steps
next($array);
next($array);
echo current($array) . "<br />\n"; // "step three"
// reset pointer, start again on step one
reset($array);
echo current($array) . "<br />\n"; // "step one"
?>
Notes
Note: The return value for an empty array is indistinguishable from the return value in case of an array which has a bool
falsefirst element. To properly check the value of the first element of an array which may containfalseelements, first check the count() of the array, or check that key() is notnull, after calling reset().
See Also
- current() - Return the current element in an array
- each() - Return the current key and value pair from an array and advance the array cursor
- end() - Set the internal pointer of an array to its last element
- next() - Advance the internal pointer of an array
- prev() - Rewind the internal array pointer
- array_key_first() - Gets the first key of an array
